Originally Posted by slrassoc
The 100ATR uses the same scope bases as the Remington 700, Howa Legacy and the Weatherby Vanguard. It's just that most literature has never been updated to say so. This should help you figure out what to order.
The 2 piece mounts ARE the same; I contacted EGW directly for a 1 piece Short Mount Picatinny rail and they told me they did not make one but send them my rifle and they would make a custom rail. I contacted DNZ, the makers of the 1 piece denutz scope mounts and was told by them that the Remington base does not fit the 100ATR Short Action; they do make one for the 100ATR Long Action.
I did purchase a Remington Short Action picatinny mount upon the advice given by Mossberg/Maverick's Customer Service Representative. It does NOT fit. The Remington action is shorter than the Mossberg and ALL the screw holes do NOT line up. I then recontacted Cus Serv and they sent me a picatinny rail; the differences in size and holes is apparent when lined up with the Remmy's. My experience is with the Short Action ONLY.
The bottom profile of both are the same, the 2 front and 2 rear holes spaces are the same BUT the distance from the 2 front holes to the 2 back holes of the SA 100ATR Mossy are Not the same as the Remmy.
NOW if the weaver 1 piece bases have a slotted or extra front hole in the short action they may fit.
I also own a Howa Short action .308; the same info applies to the Howa as the SA 100ATR; additionally the 100ATR short action 1 piece base does NOT fit the Howa. DNZ DOES make a Howa Short Action 1 piece base as well as Long Action